When Is a Crossed Aldol Reaction Said to Be Synthetically

question 11

Multiple Choice

When is a crossed Aldol reaction said to be synthetically useful?

• A)When both carbonyl compounds have a hydrogens
• B)When both carbonyl compounds have no a hydrogens
• C)When one carbonyl compound has no a hydrogens
• D)When one carbonyl compound has no b hydrogens

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Definitions:

Repressor

A protein that binds to specific DNA sequences, preventing the transcription of certain genes and thereby controlling gene expression.

Promoter

A region of DNA that initiates transcription of a particular gene, typically located near the transcription start sites of genes.

Inducer

A molecule that binds to a repressor protein, converting it to its inactive form, which is unable to prevent transcription.

Lactose

A disaccharide sugar found in milk and dairy products, which is broken down into glucose and galactose by the enzyme lactase.